import java.util.HashMap;
import java.util.Map;

/**
 * @author jiaxiangzhen
 * @date 2021/9/22 18:11
 */
public class HelloWorldsZeroSixThreeSix {


        public static void main(String args[]){
            Map<Integer,String> m = new HashMap();
            int a[] = {1,2,2,4,5,3,2,4,1,5,6,7,6,5,4,3,5};
            for(int i=0; i<a.length;i++){
                m.put(i,"");
            }
            for(Integer o: m.keySet() ){
                System.out.println(o+m.get(o));
            }
        }
    }


